// namespace Components {
  export namespace SubComponents {
    export class Test {

    }
  }
  export interface User {
    name: string
  }
  export class Header {
    constructor() {
      const elem = document.createElement('div')
      elem.innerText = 'This is Header'
      document.body.appendChild(elem)
    }
  }

  export class Content{
    constructor() {
      const elem = document.createElement('div')
      elem.innerText = 'This is Content'
      document.body.appendChild(elem)
    }
  }
  
  export class Footer{
    constructor() {
      const elem = document.createElement('div')
      elem.innerText = 'This is Footer'
      document.body.appendChild(elem)
    }
  }
// }